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CERN Colloquium , 28/04/11. THE COMMON ORIGIN OF GRAVITY DARK ENERGY AND MATTER Erik Verlinde University of Amsterdam. Matter and Forces. Current Paradigm. FUNDAMENTAL FORCES: carried by elementary particles . We may need to reconsider our current paradigms theory & observation.

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## THE COMMON ORIGIN OF GRAVITY DARK ENERGY AND MATTER Erik Verlinde University of Amsterdam

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**CERN Colloquium , 28/04/11**THE COMMON ORIGIN OF GRAVITY DARK ENERGY AND MATTER Erik VerlindeUniversity of Amsterdam**CurrentParadigm**FUNDAMENTAL FORCES: carried by elementary particles**We mayneedtoreconsiderourcurrentparadigmstheory &**observation**StringTheory**FUNDAMENTAL FORCES: carried by vibrating strings**EMERGENCE**We use concepts and observe phenomena at a macroscopic scale, which are derived from a microscopic scale where they have no a priori meaning**Black Hole**Horizon m • Consider a particlegradually • loweredinto a black hole. • Classically, the energy • associatedwith the particlegets • redshifted, and vanisheswhen • the particle is at the horizon. Bekenstein**Black Hole**Horizon m • Nowtake a gas of particles • lowered in to a black hole. • What happens to the entropy? Bekenstein Hawking**UnruhTemperature**in accelerated frame**Holographicprinciple**The information associated with a certain part of space may be (heuristically ) represented as bits on the surface surrounding it.**ADS/CFT CORRESPONDENCE**EQUIVALENCE BETWEEN FIELD THEORY ON THE “BOUNDARY” AND GRAVITY IN THE “BULK” ONE SPACE DIMENSION EMERGES CORRESPONDING TO THE “SCALE” OF THE BOUNDARY THEORY. RADIAL EVOLUTION IS LIKE RENORMALIZATION GROUP FLOW.**Bulk description**Black Hole In AdS space Particle gets lowered in to black hole Hot CFT Boundary description: Thermal Heat Bath Delocalized state gets thermalized by heath bath**Entropicforce (wikipedia)**An entropic force is a macroscopic force whose properties are determined not by the character of an underlying microscopic force, but by the whole system's statistical tendency to increase its entropy.**Warmtebad**Polymeer**Warmtebad**Polymeer**Polymer**Entropic Force**Gravity as anEmergentForce**• At a fundamentalscaleournotions of space and time and matter cease to exist: they are derivedconcepts. • In describing Nature in terms of space-time and matter, we ignoremanydegrees of freedom. • Gravityarisesbecause the amount of phasespace (information) availablefor these degrees of freedom is influencedby the location of matter in space and time.**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 001100011011101010 010100101101001100**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**A HEURISTIC**ARGUMENT 01010011100100110011 01010011100100110011**This is heuristic, so far…**• It is bit of a “swindle” • but it catches the essence. • It should be seen as a • metaphore. But of what? • Why does it work? • What is the meaning of the temperature? • What is the nature of this information? • Why is it stored on screens? Can this be derived? • Why is gravity attractive? • What about the other forces? • Are there observable consequences? 0110100111010110100101011011011010101100**Holographicscreens at equipotential(= equal redshift)**surfaces**The phase space can be described by counting the ways in**which the energy can be distributed over the cells on the boundary

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